Louisiana's bayous are the slow, often stagnant creeks and old river channels found mostly in the state's southern third, and they are lived on rather than just looked at. The best known are Bayou Lafourche, a 171 km (106 mi) former Mississippi distributary that supplies drinking water to about 300,000 people and is lined by towns from Donaldsonville to Golden Meadow; Bayou Teche, a 201 km (125 mi) channel through the Acadian heartland of Breaux Bridge, St. Martinville and New Iberia; and Bayou Bartholomew, at about 586 km (364 mi) the longest bayou in the world, which runs from Arkansas into Morehouse Parish. Around them live the Chitimacha nation, the Cajun communities descended from Acadian exiles, a crawfish industry that harvests about 100 million pounds a year, and the oil-service economy of Port Fourchon. The same water now threatens many of those communities, because coastal Louisiana has lost more than 1,900 square miles (4,900 km²) of land since 1930.
Charenton and the Chitimacha, Bayou Teche's first people
Long before any French name was attached to the water, the bayous belonged to the Chitimacha, the Attakapa and their neighbours. Bayou Lafourche itself was first mapped as the Chetimachas River, La Fourche des Chetimaches, "the fork of the Chitimacha". The name Teche may also come from them: one explanation links it to a Chitimacha word for snake, matching the bayou's coils and a tribal story of a giant serpent whose body left the channel behind when it died.
The Chitimacha still hold a reservation near Charenton in St. Mary Parish, on Bayou Teche. It is a small part of their pre-contact territory, but it makes them the only Louisiana tribe still controlling some of its original land. A federal decree once confirmed 1,062 acres as Chitimacha land; by the early 20th century tax debts had cut that down, and in 1915 Sarah Avery McIlhenny of the Tabasco-making family bought the last 260 acres at a sheriff's sale and transferred them back so they could be held in trust. The tribe numbered about 1,100 people in 2011 and has used gaming revenue to fund a museum and a programme reviving the Chitimacha language, whose last fluent speakers died in the 1930s.
Acadian arrivals on the Teche, 1764 to 1785
The people most associated with bayou country arrived as refugees. Britain began deporting French-speaking Acadians from what is now Nova Scotia and New Brunswick in 1755, an expulsion remembered as Le Grand Dérangement. The first Acadians to reach Louisiana, a party of 21, landed at New Orleans in February 1764. On 27 February 1765 Joseph Broussard brought about 200 more aboard the Santo Domingo, and in April he was made commander of the "Acadians of the Atakapas" at St. Martinville. By late June 1765 the pioneer settlement of Fausse Point had been laid out near present-day Loreauville. Around 1,500 more came from France in 1785.
The Spanish colonial government settled them west of New Orleans, in the Attakapas country, and Bayou Teche was their road. In 1779 about 500 colonists from Málaga came up the same bayou to found New Iberia. The Teche towns that grew from these settlements are still strung along the water, and their 2020 census populations show how modest most of them remain.
Breaux Bridge shows how strongly the French inheritance held. In the 2000 census, 28.3% of its residents over the age of five spoke French at home. Further south, Bayou Teche watered rice farms. When levees went up along the Atchafalaya River in the 1930s, the bayou and its rice farms lost much of their fresh water; between 1976 and 1982 the U.S. Army Corps of Engineers built a pumping station at Krotz Springs to push Atchafalaya water back into Bayou Courtableau, the Teche's source at Port Barre.
Crawfish ponds and the 100-million-pound harvest
Breaux Bridge calls itself the Crawfish Capital of the World, a title that began as La Capitale Mondiale de l'Écrevisse among its French speakers and was made official by Bob Angelle while he was Speaker of the Louisiana House of Representatives. The town holds an annual Crawfish Festival, and Louisiana made the crawfish its official state crustacean in 1983.
The figures behind the slogan are large. Louisiana produces about 100 million pounds (45 million kg) of crawfish a year. In 1987 the state produced 90% of all the crawfish harvested in the world, and about 70% of that was eaten locally. By 2007 the harvest was about 54,800 tons, nearly all of it farmed rather than caught wild, and in 2018 93% of all crawfish farms in the United States were in Louisiana. Two species make up the catch: the red swamp crawfish, 70 to 80% of production, and the white river crawfish, the rest. Asia now dominates world output: by 2018 the Americas supplied just 4% of the world's red swamp crawfish. In the United States, though, the industry is still overwhelmingly a south Louisiana one, centred on the same parishes the Acadians settled.
Bayou Lafourche, the "longest Main Street in the world"
Bayou Lafourche is where bayou life is most crowded. Louisiana Highway 1 runs down its west bank and Highway 308 down its east, with houses, churches, shipyards and docks packed between them through Ascension, Assumption and Lafourche parishes. Locals call it the longest Main Street in the world, and dozens of crossings, from lift bridges at Raceland and Golden Meadow to the pontoon bridge at Galliano, stitch the two banks together. Thibodaux, the parish seat, sits on its banks in the north of Lafourche Parish. The first Acadian settlements in southern Louisiana were near Bayou Lafourche and Bayou des Écores, which is why the bayou is so closely tied to Cajun identity.
The bayou is also a water main. About 300,000 Louisianans drink water drawn from it, which is why management of its flow matters so much. It was once a true outlet of the Mississippi, but in 1904 it was dammed at Donaldsonville, cutting off the river water that had fed it and the wetlands around it and turning a flowing channel into something close to a stagnant ditch. Since 1950 a pumping station at the old source has supplied some flow. Since then the work has been to bring more back: the channel was dredged from Donaldsonville to Napoleonville in 2016, a water gate was built at Lockport against salt water at low tide, a weir in Thibodaux was removed in 2021 so boats can travel the whole length, and a $230 million pump station planned beside the 1950 one at Donaldsonville is meant to move three times as much Mississippi water by 2027.
Shipbuilding also grew here: Bollinger Shipyards was founded on Bayou Lafourche in 1946. Shrimp trawlers, like the one at Golden Meadow, work out of the lower bayou toward the Gulf.
Port Fourchon, Houma and the oil economy
At the bottom of Bayou Lafourche the economy changes from fishing to oil. Port Fourchon, the state's southernmost port, at the southern tip of Lafourche Parish, is the land base for the offshore industry in the Gulf of Mexico. It services more than 90% of the Gulf's deepwater oil production, has more than 600 oil platforms within a 40-mile radius, and handles traffic for the Louisiana Offshore Oil Port pipeline; the area supplies 16 to 18% of the United States' oil. The Greater Lafourche Port Commission has run it since 1960.
Inland, Houma is the largest city in Terrebonne Parish, with 33,406 people in the 2020 census. It was founded in 1832 among sugar plantations sited along the bayous for water transport. Just west of Bayou Teche, Lafayette, the "Heart of Acadiana" with a city population of 121,374 in 2020, found oil in the 1940s, and as of 2018 the city and parish had the highest number of oil and natural gas workers in Louisiana. Oil is also tied to the land crisis: from the 1940s, offshore drilling projects and dredging near Isle de Jean Charles contributed to the erosion of that island and its only road.
Isle de Jean Charles and 1,900 square miles of lost land
The wetlands that feed the bayou economy are disappearing. Levees along the lower Mississippi stop the river spreading silt into the marshes, while the ground keeps sinking and salt water moves in. Since 1930 Louisiana has lost more than 1,900 square miles (4,900 km²) of land, about 25 square miles (65 km²) a year, or a football field every 30 minutes. That loss hits fishing directly: commercial fishing is worth more than $300 million a year to the state, and over 70% of that value comes from shrimp, oysters and blue crabs whose young depend on the coastal marshes as nurseries.
Isle de Jean Charles in Terrebonne Parish shows the human cost. Home for over 170 years to the Isle de Jean Charles Band of Biloxi-Chitimacha-Choctaw, whose ancestors moved there in the 1830s to escape Indian removal, the island grew from 16 families to 77 by 1910 and lived by fishing, oyster farming and trapping. It covered more than 22,000 acres in 1955 and has since lost about 98% of that land. Only 25 families remained in the early 2000s, and in January 2016 the state received federal Housing and Urban Development funding to resettle the community, the first case of climate migration in Louisiana.
The state's response is a coastal master plan, updated every six years with the fourth edition in 2023, and a law sending oil and gas royalties to coastal restoration. Since 2018 the state has been able to receive $37.5 million from new federal offshore leases, while older leases still follow the earlier revenue split, and money from the Deepwater Horizon settlements has also gone into restoration. Whether that keeps places like Golden Meadow and Larose above water is the open question for bayou country. The river system behind all of it is traced in our guide to the Mississippi Delta, the state's other waterways are listed in rivers in Louisiana, and the swamps the bayous drain into rank among the largest swamps and wetlands in the world.